Which of the following statements provides the best explanation for why vitamin C would have helped individuals with scurvy?
1) Vitamin C promotes the synthesis of the fibronectin homodimer
2) Vitamin C promotes the formation of the collagen triple helix by changing the collagen amino acid sequence
3) Vitamin C promotes collagen secretion by inducing its cleavage
4) Vitamin C promotes proline and lysine hydroxylation, which is necessary for collagen fibril assembly
5) Vitamin C induces the formation of collagen homotrimer